Method for the catalytic gas phase oxidation of propene into acrylic acid

US6998504B1 · kind B1 · utility

Assignee

• BASF SE

Inventors

• Signe Unverricht · Mannheim, DE
• Heiko Arnold · Mannheim, DE
• Andreas Tenten · Maikammer, DE
• Ulrich Hammon · Mannheim, DE
• Hans-Peter Neumann · Ludwigshafen, DE
• Klaus Harth · Altleiningen, DE

Key dates

• Filing date: Feb 28, 2000
• Grant date: Feb 14, 2006
• Expiry date: Feb 28, 2020

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01J2523/00
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A process for the catalytic gas-phase oxidation of propene to acrylic acid, in which the reaction gas starting mixture is oxidized, with a high propene loading, in a first reaction stage, over a first fixed-bed catalyst which is housed in two successive reaction zones A, B, the reaction zone B being kept at a higher temperature than the reaction zone A, and the acrolein-containing product gas mixture of the first reaction stage is then oxidized in a second reaction stage, with a high acrolein loading, over a second fixed-bed catalyst which is housed in two successive reaction zones C, D, the reaction zone D being kept at a higher temperature than the reaction zone C.